Gasoline dispensing pump



Fume 16, i942 E. E. ElcKMEYr-:R 2,286,476

GASOLINE DISPENS ING PUMP Filed May 23, 1958 4 Sheets-Sheet 1 maar 4 po WER sw/rcH [am E. [me/w: ya@

Atta/w96 Hume 16, w42. E. E. EICKMEYER GAsoLINE DIsPENsING PUMP Filed May 23, 1938 4 Sheets-Sheet 2 /nventor EAeL f. fmt/M: Yfe @am M s; E. ElcKMEYr-:R

GASOLINE DISPEN'SING PUMP Filed May 25,y 1938 4 Sheets-Sheet 3 VENTURI A t omeys June 36,' E E; E|KMEYER 2,286,476

GASOLINE DISENSING PUMP Filed May 25, 1938 4 Sheets-Sheet 4 fm mw Patente-d June 16, 1942 GASOLINE DISPENSING PUMP Earl E. Eickmeyer, Dayton, Ohio, assignor to The Dayton Pump and Manufacturing Company, Dayton, Ohio, a corporation of Ohio Application May 23, 1938, Serial No. 209,459

2 Claims.

This invention relates to jet type pumps, and in particular jet pumps adapted for use in connection with gasoline and equivalent fuel metering and dispensing systems, such as commonly employed for measuring and dispensing gasoline and the like.

It is an object of this invention to provide an efcient, simple and economical jet pump means for assisting the dispensing pump in dispensing gasoline, kerosene, oil and the like liquid fuels.

It is a further object of this invention to provide in a dispensing system mentioned a jet pump particularly adapted for disposition in a fuel supply tank or reservoir disposed beneath the dispensing means. High pressure fluid is supplied to the ejector nozzle of the jet pump from the outlet or delivery side of said dispensing pump, whereas the inlet or suction side of said dispensing pump communicates with the Huid delivery passageway of said jet pump.

It is a further object of this invention to employ either a single or double pipe jet pump structure for positioning in, or insertion in, a tank or reservoir from which gasoline or liquid fuel is to be withdrawn by the fuel dispensing pump. The Ijet pump works in cooperation with the main dispensing pump in order to aid in lifting the liquid from the storage tank to the dispensing pump and delivery means.

Another object of this invention is to provide in a gasoline dispensing system the jet pump operated in connection with the dispensing pump with or without the use of a pressure regulator.

Another object is to provide a jet pump having concentric suction and ejector feed line pipes,

so that a novel, simplified, unitary jet pump structure is produced.

These and other objects and advantages will appear from the following description taken in connection with the drawings.

In the drawings:

Figure 1 is a diagrammatic view of a gasoline or liquid fuel dispensing device wherein two types of jet pumps are illustrated;

Figure 2 is a cross sectional view of a jet pump adapted for use wherein the ejector feed line pipe encloses the discharge pipe in concentric relationship, presenting a unitary jet pump structure;

Figure 3 is another cross section showing of the jet pump of Figure 2, taken along the line 3-3 of Figure 2, looking in the direction of the arrows;

Figure 4 is a cross sectional view of a jet pump similar to Figure 2 wherein two separate pipes are employed as the ejector feed line and suction conduit;

Figure 5 is a side View of the liquid dispensing and metering device shown in Figure 1;

Figure 6 is a detail side elevation view partly in section of the air separator and pump mounting; and

Figure 7 is a detail section view of the rotary gear pump of the liquid dispensing device.

In employing the jet pump means of this invention in liquid fuel dispensing systems, no moving parts are disposed below the ground level and an exceedingly rapid and high volume rate of liquid is obtained. The only moving part below the ground level is the foot valve of the jet pump which also racts, as a check valve for preventing the fluid from iiowing downward and out into the reservoir when the dispensing pump means is stopped. j

The dispensing pump and other parts of the system may be spaced at a substantial distance from the storage or reservoir tank without interfering with the eilicient operation of the jet pump. The jet pump is disposed in the storage reservoir tank in the manner shown in Figure 1 and operates to aid in maintaining the suction pipe full of liquid and force the same upward into the dispensing apparatus.

Due to the simplified structure of the jet pump, it may be readily inserted in the tank having an opening of relative small diameter and is provided with a single suction line which is connected to the inlet of the pump and air separator means. Further in ordinary installations, up to twenty feet suction lifts, the pressure regulating valve may be omitted. The use of such a valve will be necessary only beyond suction lifts v of twenty feet to forty or fty feet if desired.

This invention enables the user to place the electric motor remote from the gasoline tank (and above ground where it can be ventilated and away from the gasoline fumes and vapors. The motor is therefore accessible and there is a minimum of re risk.

In particular, the advantage of the invention is theA ability to pump highly volatile gasoline without any mechanical agitation of the gasoline, as by a pump impeller and without aeration of the gasoline, because a solid column of liquid can be maintained between the tank and the dispensing apparatus. This eliminates evaporation losses, particularly in hot weather, and insures accuracy in metering and measuring as it provides a constant, vuniform gasoline flow.

A further advantage is in the ability to utilize a single pump for supplying gasoline to multiple pieces of dispensing apparatus, or a single pump can be utilized for supplying gasoline from multiple tanks through one or more pieces of dispensing apparatus. Referring to the drawings in detail, in which like reference characters indicate similar parts throughout the figures, a computing gasoline meter pump casing l houses the air separator Ia and dispensing rotary pump 2. The rotary pump 2 is driven by the motor 2a through the belt 2b. A suction pipe 3 extends from the inlet side of the pump into the storage tank 4. On the outlet pressure side ofthe dispensing pump 2 and air separatorlis a discharge outlet 4a to whichris Aconnectedadisf charge pipe 5. This pipe communicateswi-th `the pressure regulating valve 6 and the pipe I to the metering part of the device, The liquid isf-clispensed through the flexible hose 'la and nozzle valve 1b attached to the fluid dispensing device I as illustrated in Figure 1.

As heretofore mentioned, the pressure -regulating valve 5 ymay be omittedwhen thesuction height for the liquid to be drawn-is twentyfeet or less. AFor installations wherein `more than twenty feetl suction lift is used itis preferable to install the pressure regulator valve in the/service or delivery pipe line.

Communicating with the discharge `lines 5 land l is a jet 'pump feed line -8 for supplying liquidAv to the jet pump I0 disposed in the storage tank 4. The ejector feed-line' 8 may yloe -of smaller diameter than the service delivery pipe line 1.

The` suction pipe 3 on the -inletside -of Athe dispensing pump 2 is connected to the pipe-19'` and the jet pump I disposed inthe'storage-'tank 4 by-way oi' one or-morepipe sections iI.` IThe .iet-pump' feed line 8 communicates vwith the -delivery or pressure pipe line 5 of the pump 2 and the pipe I2 of the jet pump I9 by means ofone orl more pipe sections I3, as illustrated in AFligure 1.

Further the jet pumpfeed line I2 is enlarged t0 form a casing around the suction pipe 9 `so that the outside wallV of the suction pipe 9 forms the'inner wall of the jet pump feed line I2. The `jetpump construction I0 eliminates the -use of the two-pipe structure as illustrated by the jet pump IiiA at the left 'in'Figure 1. The jet pump shown at Iii' comprises the suction pipe and feed line'conduit 9 and I2 respectively which may be vconnected to thev dispensingdevice I by means of the pipe sections I I and I3',y similarly as disclosed for jet pump I0 ofl Figure l.

The details/of the assembly arrangement of the jet pump ID are illustrated in the enlarged cross sections of Figures 2 and 3. In the construction illustrated-in Figures 2. and 3; the lower end of the suction pipe 9 ofV the-jetA pump II! has "screw threaded thereonpr otherwisedetachably mounted a frusto-conical'fVenturi shaped pipe section I4 which `is-olared-outward at the lower end toform a chamberl5for the -jet 'pump ejector nozzle I6 centrally disposed therein. The

Vvflared lower section vofl themember rI4 forms a fluid seal'with the inner'wall of the ejector feed line pipe I2, as vshown at lIl, Figures 2 and 3. The jetnozzle 'I6 is` ordinarily formed integral with the-section --I 4 whichiis "detachably mounted onto the end voiithe suction Apipefyas shown in Figure 2.

Threaded to the ends ofthe "feed line pipe section I2 below'theseal IIisfan elbowmember I8 which contains thezfoot valve t9-and strainer 29. The foot valve I9 is mounted to move upward against the spring 2| which maintains it on the valve seat I9' when suction is not created in the pipe 9.

Figure 4 illustrates a two-type jet pump construction as shown at the left side of Figure 1. In this modification the action of the jet pump is similar to that described in the jet pump I0. The suction conduit-and jet pump feed lines 9 and I2 areseparate and distinct. The Venturi section I4 is attached to the suction pipe 9', and the ejector feed line elbow I1 is arranged to reverse the ow of liquid and discharge it upward through the ejector nozzle of the jet pump It', similarly as injet pump I0.

--In,op.eration, referring to Figures 1, 2 and 4,

'thefdispensingipump 2 is started and primed to pipe 9 to the inlet side of the pump 2A where it 'isdischarged outward through theV delivery lines A portion doi Vthev liquidi delivered to the lines 5 and^-`l-isrecirculated backrthrough 'the ejector lfeedV lines 8 4and lI 2to"start,the action ing fluid as indicated bythe arrows'in Figures 2,

'- 3 and'l 4 the uid is forced* downward through Vthe feed pipe- I2and` upwardgthroughthe `ejector nozzle-16, so thatthe jet pump creates anadded so upper forceby reasonof the" Venturi shaped passageway I4 and restricted" 'passageway adjacent theA nozzle I6. The'jet-pumpactionthus adds tothe :upward suction forceV appliedto the kfluid in fthe conduit 9 andifgreatly-increases .the

volume rate fof:l liquid .delivered Ato"tlf1e pump 2 .for dispensing. to; themetering and'deliverypart of the system.

*The arrangement of the .air separator Ia and.

24. After.-.thefgasoline orother-fluid-being dis- .1 pensed passes throughthestrainer 241it enters .the-inletof vthe rotary. pump 2 at 25; yand is dis- @charged throughthefoutlet 26into the air sepl.arating chamber21.

- The gasoline fluidI and fentrained.- airis forced upward in the chamber 211 over the baille plate 28 Yand .the vapor and airseparates `from the 'liquid' andpasses-fupward and thence into the .oat chamber 29'through the restrictedinlet 3B.

Thefloat cham-ber 29;'is vented to the atmosphere Pure'fgasoli-ne :separated from vapor by meansof the. settling chamber `32 Vpasses out the :discharge 4a and pipe ltofthem'eteringand dissticking blades to get'stuck asin the rotary 'vane type of pump or valves to get noisy as in the rotary -eccentric type pump. On rotating the rotor and idler counterclockwise, fluid is'drawn yin through the passageway 36and forced out 'through the passageway 31.

It is to be understood, of course, thatmy invention is not limited to the exact details of construction of the V-jet -pump vand arrangement of vthe dispensing device,-since'obvious modifications within the scope of this invention may be made by those skilled in the art.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In combination in a liquid dispensing apparatus, a liquid fuel storage tank, a liquid dispensing pump and motor for operating same remote from said tank, means communicating with said pump for measuring the liquid dispensed, a main feed line connecting said tank to said pump, a jet pump disposed in said tank and communieating with the discharge side of said dispensing pump and main feed line, a dispensing con-duit and nozzle lconnected to said liquid dispensing pump, and means comprising a foot valve disposed on the lower end of said main feed line in said tank and a-dapted to prevent the return of liquid from the main feed line back into said tank to maintain the main feed line, jet pump and dispensing pump lled with liquid.

2. In a gasoline dispensing apparatus, a liquid storage tank, gear pump means for pumping liquid from said storage tank, a jet pump located in said tank and communicating with the suction and delivery line of sai-d gear pump, a liquid metering means connected to the delivery side of said gear pump, said jet pump comprising an outer casing, a suction conduit concentrically positioned in said casing, an ejector nozzle disposed therein and communicating with said outer casing and discharging into said suction conduit, conduit means connecting said outer casing chamber with a iiuid pressure means, the lower end of said suction conduit being sealed to the inner wall of said casing, and means comprising a iiuid inlet chamber communicating With said ejector nozzle an-d suction conduit below said sealed section.

EARL E. EICKMEYER. 

